The fort of Kondana, which is today on the outskirts of Pune town was then an outpost overlooking Pune and the surrounding countryside. It was strategically placed in the center of a string of forts of Rajgad, Purandar, and Torna. The capture of Kondana was necessary if Shivaji Maharaj was to re-establish de facto control over the Pune region.

Recognizing the strategic importance of Kondana, the Mughals had maintained a battalion of 5000 troops led by Udai Bhan, a relative of Mirza Raja Jai Singh. The fort was built in such a way that all its approaches were covered by cannon-fire. Only on turret was not well defended as it was at the top of a vertical overhanging cliff.

Tanaji decided that this was the only way, he could enter the fort. He dressed himself as a Gondhali (devotee of the Goddess Bhavani of Tuljapur) and roamed the surrounding villages. He won the trust of one Mahadev Koli who was in the service of Udai Bhan. Koli presented the disguished Tanaji to Udai Bhan, who was suitably impressed by this "devotee" and allowed him free access to the fort.

The Ghorpad Cliff

This is the sheer cliff that Tanaji and his brave Mavalas (comrades) scaled to surprise the Muslim army that was engrossed in a drunken orgy on the plateau seen at the top during a dark night in 1669.

Tanaji carried out a careful surveillance of the fort and at that very night when he was told that at the overhanging cliff Udai Bhan and all his senior commanders would be celebrating a usual party with an alcohol and dance orgy; Tanaji decided that he should seize this opportunity.

With almost all his troops, Udai Bhan had a roaring party on top of the overhanging cliff. Unknown to them after midnight, Tanaji and his brave followers who numbered 300 scaled the cliff using ropes tied to a reptile called Ghorpad. The Ghorpad can stick fast to any surface and a number of adults can use this force to scale a vertical cliff with the help of a rope, one end of which is tied to the Ghorpad. Silently Tanaji and his comrades slunk up to the top of the cliff.

On the other side his uncle Shelar Mama and his brother Suryaji had moved close to the other gates of the forts with another 300 Mavalas (Maratha Soldiers). On a signal from Tanaji, all his comrades who has taken up strategic position all round the celebrating Mughal army, broke into the party and mercilessly fell upon their enemies. They started slaughtering the surprised and ill-prepared and drunken Muslim soldiers.

When Udai Bhan saw that Tanaji - the leader of this invading band of Marathas was no other than the devotee whom he had given permission to visit the fort, he flew into a mad rage. On seeing Tanaji, Udai Bhan rushed at him and we are told that for a few fatal seconds, Tanaji started dancing in the same fashion as he had done as a Gondhali (devotee) when he had met Udai Bhan earlier in the day. The enraged Udai Bhan lunged at dancing Tanaji and cut off the arm with which Tanaji was holding his shield. But undaunted Tanaji used his turban to ward off further thrusts from the blade of Udai Bhan's sword and continued fighting him for 2 hours in this state with his wristless left arm bleeding profusely. It is for this feat of Tanaji, that he is called Narvir - Brave amongst Men.At the end of this ordeal, the exhausted Tanaji fell to a fatal swish of Udai Bhan's sword. But Udai Bhan too was throttled by Shelar Mama and thus lost his life.

Shivaji Maharaj is said to have said on this occasion "Gad aala, paan Simha gela" (We have won the fort but have lost the Lion - Tanaji). The fort of Kondana was renamed as "Sinhagad" in honour of Tanaji's brave deed.